forked from ko-build/ko
/
resolve.go
100 lines (85 loc) · 2.51 KB
/
resolve.go
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// Copyright 2018 Google LLC All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package resolve
import (
"context"
"fmt"
"strings"
"sync"
"github.com/dprotaso/go-yit"
"github.com/google/ko/pkg/build"
"github.com/google/ko/pkg/publish"
"golang.org/x/sync/errgroup"
"gopkg.in/yaml.v3"
)
// ImageReferences resolves supported references to images within the input yaml
// to published image digests.
//
// If a reference can be built and pushed, its yaml.Node will be mutated.
func ImageReferences(ctx context.Context, docs []*yaml.Node, strict bool, builder build.Interface, publisher publish.Interface) error {
// First, walk the input objects and collect a list of supported references
refs := make(map[string][]*yaml.Node)
for _, doc := range docs {
it := refsFromDoc(doc, strict)
for node, ok := it(); ok; node, ok = it() {
ref := strings.TrimSpace(node.Value)
if builder.IsSupportedReference(ref) {
refs[ref] = append(refs[ref], node)
} else if strict {
return fmt.Errorf("found strict reference but %s is not a valid import path", ref)
}
}
}
// Next, perform parallel builds for each of the supported references.
var sm sync.Map
var errg errgroup.Group
for ref := range refs {
ref := ref
errg.Go(func() error {
img, err := builder.Build(ctx, ref)
if err != nil {
return err
}
digest, err := publisher.Publish(img, ref)
if err != nil {
return err
}
sm.Store(ref, digest.String())
return nil
})
}
if err := errg.Wait(); err != nil {
return err
}
// Walk the tags and update them with their digest.
for ref, nodes := range refs {
digest, ok := sm.Load(ref)
if !ok {
return fmt.Errorf("resolved reference to %q not found", ref)
}
for _, node := range nodes {
node.Value = digest.(string)
}
}
return nil
}
func refsFromDoc(doc *yaml.Node, strict bool) yit.Iterator {
it := yit.FromNode(doc).
RecurseNodes().
Filter(yit.StringValue)
if strict {
return it.Filter(yit.WithPrefix(build.StrictScheme))
}
return it
}